Sofa bed with lock



June14, 1955 R. GOODMAN 2,710,411

SOFA BED WITH LOCK Filed May 29, 1953 4 Sheets-Sheet 1 INVEN TOR.

Robe/v Good/27am BY ,1 RNEX June 14, 1955 R. GOODMAN 2,710,411

SOFA BED WITH LOCK Filed May 29, 195:5 4 Sheets-Sheet 2 FIG..4

275 27a 73 5x 4 F|G 24 INVENTOR ROBERT GOODMAN BY LQ,

ATTORNEY June 14, 1955 R. GOODMAN SOFA BED wmx LOCK 4 Sheets-Sheet 3Filed May 29, 1953 l N VE NTOR $BERT GOODMAN ATTOZN EY June 14, 1955 R.G-OODMAN 1 son BED WITH LOCK Filed May 29, 1953 I 3 I N VENTOR ROBERTGOODMAN ATTORNEY 4 Sheps-Sheet 4 United States Patent SOFA BED WITH LOCKRobert Goodman, Philadelphia, Pa.

Application May 29, 1953, Serial No. 358,268 1 Claim. c1. s 13 Myinvention relates to a combination sofa and bed,

known as a davenport, and relates particularly to the articulated bedconstruction and locking mechanism so that an accidental opening willnot be effected.

Heretofore, davenports having full size beds built therein necessitatedextra width or depth to accommodate said full size beds and themechanism'for the operation of the folding mechanism. The extra widthentailed extra use of materials for outer frame construction and extramaterials for covering of the wider sofa arms, as well as extra costsfor labor entailed in building such wider sofas.

It, therefore, is an object of my invention to provide in a davenport ofconventional width a full size bed eliminating extra materials inconstruction as well as the extra labor costs involved in building awider sofa.

Another object of my invention is to provide a davenport having a fullsize bed built therein of conventional outer appearance.

Still another object of my invention is to provide a davenport with afull size bed built therein which is positively locked againstunfolding, but which is readily and easily unfolded when properlymanipulated.

Another object of my invention is to provide in a davenport closingmechanism wherein the pivot point floats from one side to another sidein order to reduce the width of the davenport.

Other objects of my invention are to provide an improved device of thecharacter described, that is easily and economically produced, which issturdy in construction, and which is highly efiicient in operation.

With the above and related objects in view, my invention consists in thedetails of construction and combination of parts, as will be more fullyunderstood from the following description, when read in conjunction withthe accompanying drawings in which:

Fig. 1 is a side elevational view of a davenport embodying my inventionin a bed position and showing the width of the frame.

Fig. 2 is a fragmentary perspective view of the davenport showing thefoot section partially folded over.

Fig. 3 is a perspective view of the davenport with the foot sectioncompletely folded over.

Fig. 4 is a fragmentary perspective view of the davenport in a partiallyclosed position.

Fig. 5 is a fragmentary perspective view showing the locking members andthe link which moves the pivot for the keeper hook.

Fig. 6 is a fragmentary side view of the head and body sections with akeeper hook used to close the intermediate leg of the bed and to holdthe entire bed frame in a locked position.

Fig. 7 is a fragmentary detailed side view of the L- shaped closingmechanism used to close the articulated sections.

Fig. 8 is a detailed side view'of the L-shaped closing mechanism.

Fig. 9 is a fragmentary detailed inside view of the L- shaped closingmechanism and the manner of joining the bed frame to the sofa frame.

Fig. 10 is a fragmentary detailed outside View of the L-shaped closingmechanism.

Fig. 11 is a fragmentary detailed side view of the bed section showingthe position of the foot section holding members when the bed frame isfolded.

Fig. 12 is a fragmentary detailed side view of the bed frame showing thefoot section folded over and the section locking mechanism partiallyactuated.

Fig. 13 is a fragmentary view of the bed frame showing the section lockwith the keeper hook omitted.

Referring now in greater detail to the drawings, wherein similarreference characters refer to similar parts, and also bearing in mindthat the bed frame has similarly constructed parallel sides upon which abed spring (not shown) is supported, I show a davenport having an outerframe section, generally designated as A, and a bed frame having a headsection, generally designated as B, a body section, generally designatedas C, an intermediate section, generally designated as D, and a footsection, generally designated as E; all of the aforementioned sectionsbeing articulated together and being adapted when open to lie insubstantially co-planar relationship to serve as a bed, and when closedto serve as a resilient seat section for a sofa cushion.

It is to be noted that the outer frame section A is of conventional sofaframe construction having a back frame A1, an arm frame member A2, andcross brace member A3. This outer frame may be made of any suit ablematerial such as wood, steel, or aluminum. The width of the frame A isillustrated in Fig. 1 and with my invention is reduced as compared tothe prior art davenports for the same length of bed frame.

The head section B of the bed frame consists of a support member 14,made of steel angle which is connected to the outer frame A by a shortarm 11 which has a pivotal connection PI on the support member 14, andwhose other end is joined to approximately the center of the verticallyextending cross member A3 of outer frame A by means of a pivotedconnection P2. The support member 14 also is joined to the back restframe Al near its bottom by a long arm 10 whose one end is pivotallyjoined at P3 to the support member 14 a distance approximately equal tothe length of the short arm 11 along support member 14. The other end oflong arm 10 is pivotally joined to the back rest A1 at pivot P4. Theother end of the support 14 is joined by a pivoted connection P5 to thesupport member 38 of the body section C. A helical extension spring 16,whose function will be hereinafter explained, is connected between thebottom of outer frame A and short arm 11.

The body section C consists of an angle support member 38 made of angleiron whose length is substantially the same as the width of the sofa andwhich is pivotally joined at the pivot P5 to the support member 14 ofthe head section as hereinbefore mentioned. The other end of supportmember 38 is pivotally joined at pivot P7 to the intermediate section D.The body section C is provided with a leg 39 which is pivotallyconnected at the pivot P10 to the support member 38 at about themidpoint of the entire bed frame to give greater rigidity and support tothe bed frame.

A front board is fastened by a suitable means to J a support 48 of aclosing linkage consisting of link mem- J other end of the link 50 ispivoted at P21 intermediate the ends of the leg 39.

The foot section B consists of a curved support member 42 which is bentupward at an angle of approximately degrees for the last quarter of itslength. The straight end of curved support member 42 is pivotally joinedat the pivot P8 as seen in Fig. ll to the front board support section D.while its bent end is pivotally joined at P9 to a leg 43. The leg 43 hasa ground engaging portion 4313 at one end and a sideways extending studor lug A which is adapted to be engaged by a keeper hook 24. The footsection side bar 44 of the foot section C (which is bent downwardly forabout its length at 30 degrees) is pivotally joined at P20 to one end ofthe intermediate section D. The foot section frame 44 has the leg 43pivotally connected thereto at pivot P11. The foot section frame 44 isprovided with a mattress guide at its end which need not be described ingreat detail here. The leg 43 is provided with the lug 45A at its upperend whose function will hereinafter be described.

A keeper hook 24 is pivotally engaged at P12 through guide slot 27 insupport member 38 to one end of a keeper hook actuating link 41 whoseother end pivotally is connected at P13 to the front board supportsection D. Another keeper actuating lever 29 has one end pivotallyjoined at P14 to support member 14 while the other end of said keeperactuating lever 29 is pivotally connected to keeper hook 24 at P15.

The bottom of leg 39 is pivotally joined at P22 to one end of a closinglink 52 whose other end is pivotally joined at P23 to the short arm ofan L-shaped closing mechanism 26 which is pivotally joined at P24 at thevertex of the l. to support member 38. The intermediate portion of thelong arm of the closing mechanism 26 is so constructed that it canrotate as well as slide on the rollers 31A in the channel member 31. Theend of the long arm of closing mechanism 26 is pivoted at P24 to a bedframe C. The channel member 1 is fastened to the outer frame A so thatits groove 31 is at an upwardly inclined angle with respect to thebottom of outer frame A. A spring 36 is fastened at one end to the topof bed frame support 33 while its other end is attached to closingmechanism 26 a short distance from its pivotal connection P24 to supportmember 38.

The arm 26 is pivotally connected at 318 to rollers 31A which ride ingroove 31 and the bottom of the arm 26 is pivoted at 26C to a pivotedlink 26A which is pivoted at 268 to a fixed bracket outer frame A.

Now when the bed frame is folded from the open position shown in Fig. lthe foot section B is lifted to the position shown in detail in Fig. llwhereupon the leg 43 is caused to fold over due to the action of thelink 42 acting through pivots P8 and P9. Further folding of the footsection B pushes the keeper hook actuating link 41 causing one end ofkeeper hook 24 to slide along guide slot 27 from end 273 to 27A. Theother end of keeper hook 24 rises in a vertical manner placing it in aposition to engage the lug 45A located at the end of the leg 43 as shownin Fig. 11.

The intermediate bed section C is then lifted as shown in Fig. 4 whichbrings into play closing mechanism 26 which pivots on its rotatingsliding point in groove 31 to a direction perpendicular to the bottom ofouter frame A pushing the short arm of lever 26 toward support member 38thereby pulling in link and the intermediate leg 39 and positioning thefront board 45 parallel with front board support member 40 or theintermediate section C. At the same time the support member 38 of bodysection C bends at an angle to the support member 14 at its pivot at PS,the keeper actuating lever 29 pushes keeper book 24 forwardly therebyclosing the keeper hook firmly about the lug 45A as shown in Fig. l1.

The whole bed frame is then pushed toward the head rest AI of the outerframe A causing the folding mechanism short arm to travel beyond supportmember 38 fully closing intermediate leg 39. At the same time thesupport member 14 is pushed on its pivots PI, P3 back of the head restAI. Simultaneously spring 36 exerts a downward pressure to pull the bedframe onto bed frame support 18. The pulling down of the bed frame Bcauses the support frame member 14 or the head section which is rigidlylocked at an angle to the body section C or the support member 33 bymeans of the lug 45A and the book 24 to move back of the head rest AI.The spring 16 acts as a counterforce to the tension of spring 36 sothere is a smooth continuity between these operations.

The locking mechanism 26 now has its short arm perpendicular to thesupport member 38 and its long arm parallel to support member 38 withthe support member 38 resting on the frame stop 33 and its slidablypivoted point at its lowermost position in channel 31 which serves tolock the bed frame onto outer frame A until the front board 45 is liftedand pulled outwardly at which time a reversal of the operationsdescribed ocours.

It should be noted in Fig. 7 that the L-shaped closing mechanism 26 ispivoted at P24 to the intermediate section C and that the lower portionthereof floats on the inclined guide channel 31 at pivot 31B and on link26A at the pivot 26C, the link 26A being pivoted at 268. Thisconstruction enables the spring 36 to keep the closing mechanism in astable position except when it is going past dead center and thisenables the bed frame to be narrower since the closing mechanismposition shifts along the incline 31. In other words the position of theclosing mechanism changes when the bed sections are changed from open toclosed positions.

Attention is to be drawn to the fact that in Fig. 11 the pivots P5, P12,P14, and P15 hold the keeper actuating link 29 parallel to the bodysection C. However, movementof the pivot P12 from one end 27A of theslot 27 to the other end 275 (Figs. 5, 6, and 13) results in theactuating link 29 moving in substantially the same plane as the bodysection C. This sliding action of the pivot P12 in the slot 27 enablesthe body section C to be made shorter than would be the case if nosubstantial protrusion upwardly of the keeper book 24 occurs. If thekeeper hook 24 should be maintained level with the top of a mattressthen a person sleeping on the mattress might injure himself by bumpingagainst the keeper hook.

Although my invention has been described in considerable detail, suchdescription is intended as being illustrative rather than limiting,since the invention may be variously embodied, and the scope of theinvention is to be determined as claimed.

I claim as my invention:

A foldable bed frame for a sofa bed comprising head, body, intermediate,and foot sections pivotally connected in end to end relationship andadapted to be forwardly unfolded to a bed position wherein the sectionsare arranged in substantial coplanar relationship with the head and footsections at the ends of the bed, the body section adjacent the head andthe intermediate section adjacent the foot section and being adapted tobe rearwardly folded to a seat position wherein the foot section forms aseat cushion support and is parallel to and spaced above said bodysection with said head section extending upwardly and at right angles tosaid body section, a substantially L-shaped leg pivoted intermediate itsends to the free end of the foot section, said leg having a short armwhich extends above and rearwardly along said frame in bed position, alaterally extending bolt fixed to said short arm, a first link having anend pivotally joined to said intermediate section and its other endpivotally joined to said leg above its pivot which is connected to thefoot section when in bed position, a second link having one end pivotedto said intermediate section, a right angle keeper pivotally attached tothe free end of said second link, a slot in said intermediate section,said free end of said second link being guided Within said slot, 21think link having one end pivotally connected to said head section andthe other end pivotally connected to said keeper whereby relativepivotal movement of said head and body sections Wiii rock said keeper,and said bolt being adapted to be hooked by said keeper when all of saidsections are folded into sofa position in order to keep said footsection from accidentally moving upwardly when it forms the seat sectionof the sofa, and said bolt being adapted to rest directly upon said bodysection to serve as a brace in order to prevent said foot section frommoving downwardly against said body section when the sofa is formed.

References Qited in the file of this patent UNITED STATES PATENTS DykeDec. 16, 1913 Holst Jan. 26, 1915 Holst et al Apr.11, 1916 Woller Apr.29, 1952 Bank et a1 June 23, 1953 FOREIGN PATENTS Great Britain June 9,1932 France Dec. 5, 1934

